Two NASA astronauts will step outside the International Space Station on Thursday to take part in U.S. Spacewalk 93, NASA's fifth-ever all-female spacewalk.

Three Chinese astronauts have landed back on Earth after six months on China’s space station

Veteran astronaut Don Pettit conducted hundreds of hours of research and captured over half a million photos during his ISS mission.

Scientists say a newly discovered green comet likely has broken apart and won’t be visible to the naked eye

A Soyuz capsule carrying two Russian cosmonauts and one American astronaut safely landed Sunday in Kazakhstan, concluding a 220-day mission aboard the International Space Station

Nikku Madhusudhan, a professor of astrophysics and exoplanetary science at the University of Cambridge, discusses the discovery of hints of life found on the distant planet K2-18b.

ABC News' Stephanie Ramos spoke with Cambridge University astrophysicist Dr. Nikku Madhusudhan on a possible massive planet discovery called K2-18b and its strong evidence of extraterrestrial life.

NASA astronaut Don Pettit celebrates his 70th birthday with a spectacular return from the International Space Station after 220 days in orbit.

Astronomers have detected possible chemical signs of life on a faraway planet

The discovery was made by a Cambridge research team looking at planet K2-18b while using Nasa's James Webb Space Telescope.

ABC News’ Linsey Davis spoke with former NASA astronaut, Susan Kilrain, about the iconic but brief all-women crew space mission and what it means for the future of space tourism.

An all-female flight crew, including Katy Perry, Gayle King and Lauren Sanchez blasted into space aboard Jeff Bezos' Blue Origin New Shepard rocket, experiencing zero gravity before parachuting home.

ABC News contributor and astrophysicist, Hakeem Oluseyi, says the Blue Origin launch provides pathways for more people having access to space.

New video released by Blue Origin shows Katy Perry, Gayle King, Lauren Sánchez and other members of the crew floating in space.

Space expert Eric Ingram discusses the importance of getting more people to space after Blue Origin's all-female crew completed their trip into space Monday morning.

While they didn't get close to any stars, passengers aboard the latest Blue Origin flight included earthly stars like pop singer Katy Perry and TV journalist Gayle King.

Blue Origin’s NS-31 mission launched into space on Monday morning with an all-female crew, including pop star Katy Perry.

Susan Kilrain, a former astronaut, says the women have a “unique opportunity” to encourage people and young children to be interested in space.

Jeff Bezos opens the hatch so the all-female space crew, including Katy Perry, Gayle King and his fiancée Lauren Sánchez, can exit, after traveling to space aboard Blue Origin rocket.

Blue Origin’s all-female crew, which includes pop star Katy Perry, completed their trip into space Monday morning.

Blue Origin’s NS-31 mission launched into space on Monday morning with an all-female crew, including pop star Katy Perry.

The pink moon will rise on Saturday, April 12.

Katy Perry and an all-female crew will launch on the New Shepard rocket on April 14.

The crew observed Earth's polar regions 430 kilometers above the surface, allowing the Crew Dragon Resilience to travel from the Northern to Southern Pole.

Astronomers have gotten a glimpse of the "city-killer" asteroid before it disappears until 2028, according to NASA.

Astronaut Suni Williams spent an unexpected nine months in space. When she finally came home, her two dogs were so excited to see her. "Best homecoming ever," she captioned the video.

Mark your calendars for several spectacular events this month.

Skygazers can enjoy meteor showers and other dazzling displays in the night sky all month long, according to astronomers.

NASA astronaut Butch Wilmore, who was in space for more than nine months, said everyone has responsibility for things that went wrong with Starliner's test flight

NASA's Barry "Butch" Wilmore and Sunita "Suni" Williams were scheduled to return to Earth in June 2024 but spent an unplanned nine months in space.

NASA's Butch Wilmore said there was a responsibility with NASA and Boeing, including himself for issues with the Starliner mission.

The once-in-a-lifetime explosion of T Coronae Borealis, also known as the "Blaze Star" is still pending -- but the event will be occurring soon, according to astronomers.

NASA astronaut Don Pettit designed the Capillary Cup to drink coffee without a bag and straw aboard the International Space Station.

Some U.S. states could be treated with a northern lights display due a minor geomagnetic storm on the sun, according to space forecasts.

A partial solar eclipse will be visible from the U.S. this weekend, but only a select few of the northernmost states are expected to get a glimpse.

The last Boeing Starliner mission was extended from eight days to over nine months due to capsule issues after docking at the International Space Station.

A space robot said "goodnight" to the moon as it completed its mission, capturing the first high-definition images of a lunar sunset before it fell silent.

NASA astronauts are returning to Earth after nine months in space. Experts have said a prolonged period in space can come with changes to human physiology and psychology.

SpaceX Dragon Freedom splashed down off the coast of Florida, carrying Sunita 'Suni' Williams and Butch Wilmore along with NASA astronaut Nick Hague and Roscosmos cosmonaut Aleksandr Gorbunov.

A four-member crew, including NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore, left the ISS early Tuesday on a SpaceX Dragon spacecraft.

ABC News’ Stephanie Ramos spoke with astrophysicist Hakeem Oluseyi about how the bodies of astronauts Barry "Butch" Wilmore and Sunita "Suni" Williams have been changed by their time in space.

NASA astronauts Butch Wilmore and Suni Williams have officially returned to Earth after an unplanned nine months in space, here's how Boeing's Starliner mission unfolded.

Astronomers have confirmed the existence of four planets orbiting a star less than 6 light-years away with help from some of the world's most powerful telescopes.

Space industry expert Eric Ingram breaks down the journey back to earth for astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore since departing the ISS.

NASA's SpaceX Crew-10 mission successfully undocked from the International Space Station and is headed back to Earth, carrying a crew that includes two astronauts whose return to Earth was delayed.

What was to be an eight-day test flight became a nine-month extended stay on the International Space Station due to issues with the Boeing Starliner.

ABC News’ Terry Moran speaks to space industry expert Eric Ingram about SpaceX’s launch of astronauts to the International Space Station to relieve two Americans whose trip was extended unexpectedly.

With the hydraulic issue that postponed the Starliner mission on Wednesday fixed, astronauts Barry "Butch" Wilmore and Sunita "Suni" Williams are one step closer to coming home. 

Many in the U.S. caught the total lunar eclipse, featuring a "blood moon."

The eclipse was visible throughout most of North and South America, as well as parts of Africa, Europe, Australia and Japan.